CPI VZX-6987A7

750W Compact Medium Power Amplifier
for Satellite Communications
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The VZX-6987A7
750 Watt TWT
Medium Power
high efficiency in a
compact package.
Easy to Maintain
Provides 750 watts of power in a 5 rack unit
package, digital ready, for wideband, single- and
multi-carrier satellite service in the 7.9 - 8.4 GHz
frequency band. Ideal for transportable and fixed
earth station applications where space and prime
power are at a premium.
Modular design and built-in fault diagnostic
capability with convenient and clearly visible
indicators for easy maintainability in the field.
Employs a high efficiency dual-depressed
collector helix traveling wave tube backed by
many years of field-proven experience in airborne
and military applications.
Worldwide Support
Backed by over three decades of satellite
communications experience, and CPI’s
worldwide 24-hour customer support network
that includes fourteen regional factory
service centers.
Simple to Operate
User-friendly microprocessor-controlled
logic with integrated computer interface,
digital metering, pin diode attenuation and
optional integrated linearizer for improved
intermodulation performance.
Global Applications
Meets International Safety Standard EN-60215,
Electromagnetic Compatibility 89/336/EEC
and Harmonic Standard EN-61000-3-2 to satisfy
worldwide requirements.
811 Hansen Way
P.O. Box 51625, Palo Alto, CA 94303
tel: +1 (650) 846-3803
fax: +1 (650) 424-1744
e-mail: [email protected]
750W Compact Medium Power Amplif ier
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Integral Linearizer
Remote Control Panel
Redundant and Power
Combined Subsystems
External Receive Band
Reject Filter (increases
loss by a minimum of 90
dB at 7.25 to 7.75 GHz)
Electrical (continued)
Output Power
7.9 - 8.4 GHz
500 MHz
75 dB min. at rated power, 88 dB max.
78 dB min. at small signal, 90 dB max.
RF Level Adjust Range
0 to 30 dB (via PIN diode attenuator)
Gain Stability
At constant drive & temp.
Over temp., constant drive
(any frequency)
Small Signal Gain Slope
Small Signal Gain Variation
Across any 40 MHz band
Across the 500 MHz band
Across 500 MHz,
with linearizer option
-30 dBc max. at total output
power 3 dB backoff (300 W with
linearizer) QPSK modulation
Group Delay
0.01 ns/MHz linear max.
±0.25 dB/24 hrs. max.
(after 30 min. warmup)
±1.0 dB over oper. temp. range
±0.75 dB over ±10˚C
±0.04 dB/MHz max.
0.5 dB pk-pk max.
2.5 dB pk-pk max.
(in any 40 MHz band)
Primary Power
0.001 ns/MHz sq. parabolic max.
0.5 ns pk-pk ripple max.
Single phase, 208-240 VAC ±10%
47- 63 Hz
Power Consumption
2.2 kVA typ. (at 3 dB backoff)
2.7 kVA max.
Power Factor
0.95 min.
Inrush Current
200% max.
Input VSWR
1.3:1 max.
Output VSWR
1.3:1 max.
Ambient Temperature
Continuous operation
Full spec compliance
Operation without damage
-10°C to + 50°C operating
-40°C to + 70°C non-operating
Any value
Relative Humidity
95% non-condensing
10,000 ft. with standard adiabatic
derating of 2°C/1000 ft., operating;
50,000 ft. non-operating
Shock and Vibration
Designed for normal transportation
environment per Section 514.4
MIL-STD-810E. Designed to
withstand 20G at 11 ms (1/2 sine
pulse) in non-operating condition.
AM/PM Conversion
-50 dBc below 10 kHz
-20[1.5 +log F(kHz)] dBc,
10 kHz to 500 kHz
-85 dBc above 500 kHz
2.5°/dB max. for a single-carrier
at 8 dB below rated power.
With optional integral linearizer,
can be tuned to 1.0 deg/dB max.
Harmonic Output
-60 dBc at rated power,
second and third harmonics
Noise and Spurious
<-90 dBW/4 kHz, 7.25 - 7.75 GHz
<-75 dBW/4 kHz, in passband
<-65 dBW/4 kHz, in passband
with linearizer option
<-165 dBW/4 kHz, in passband
with optional filter
<-155 dBW/4 kHz, in passband
with both options
Noise Figure
10 dB max.; 15 dB max.
with optional integral linearizer
not up in the air
Certificate Number: 30515
For more detailed information, please refer to the corresponding CPI Technical Description.
Note: Specifications may change without notice as a result of additional data or product refinement. Please
contact CPI before using this information for system design.
Spectral Regrowth
750 W min. (58.75 dBm)
650 W min. (58.13 dBm)
Phase Noise
phase noise profile
-6 dB
AC fundamentals related
-36 dBc
Sum of spurs (370 Hz to 1 MHz) -47 dBc
-24 dBc max. with two equal
carriers at total output power 7
dB (3 dB with optional integral
linearizer) below rated singlecarrier output
3.5 dB pk-pk max.
Residual AM, max.
MKT 121, ISSUE 3
Forced air w/ integral blower. Rear
air intake & exhaust. Maximum
external pressure loss allowable:
0.5 inches water column.
RF Input Connection
Type N female
RF Output Connection
CPR-112 waveguide flange,
grooved, threaded UNF 2B 10-32
RF Output Monitor
Type N female
Dimensions (W x H x D)
19 x 8.75 x 24 in.
(483 x 222 x 610 mm)
95 lbs (43 kg) max.
Heat and Acoustic
Heat Dissipation
2000 Watts max.
Acoustic Noise
68 dBA (as measured at 3 ft.)